\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 4/0/B, 1.5/0/C}
    \tkzDefTriangle[equilateral](A,C)  \tkzGetPoint{M}
    \tkzDefTriangle[equilateral](C,B)  \tkzGetPoint{N}

    \tkzDrawPolygon(A,C,M)
    \tkzDrawPolygon(B,C,N)
    \tkzDrawSegments(A,N  B,M)
    \tkzLabelPoints[above](M,N)
    \tkzLabelPoints[below](A,B,C)
\end{tikzpicture}

